cloud-fan commented on code in PR #50631:
URL: https://github.com/apache/spark/pull/50631#discussion_r2057674325
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/constraints.scala:
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@@ -198,3 +268,30 @@ case class ForeignKeyConstraint(
copy(userProvidedCharacteristic = c)
}
}
+
+
+/** This class is used to represent a collection of constraints in a table.
+ * It is used for analysis purposes only.
+ *
+ * @param children The list of constraint expressions
+ */
+case class Constraints(children: Seq[Expression]) extends Expression with
Unevaluable {
Review Comment:
why can't we use `Seq[TableConstraint]` here?
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